One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(9,10)(11,13)(12,14)(15,16)(17,18,22,29,20,27,38,48,21,28,23,30,24,31,39,42)(19,32,35,45,33,46,41,47,34,25,36,44,37,43,40,26)(2,5)(6,8)(9,11,12,15)(10,13,14,16)(17,19,22,35,20,33,38,41,21,34,23,36,24,37,39,40)(18,25,29,44,27,43,48,26,28,32,30,45,31,46,42,47)(1,3)(2,6)(4,7)(5,8)(10,14)(13,16)(17,19,21,34)(18,26,28,47)(20,37,24,33)(22,40,23,41)(25,42,32,48)(27,44,31,45)(29,43,30,46)(35,38,36,39)(3,7)(6,8)(17,20,21,24)(18,27,28,31)(19,33,34,37)(22,38,23,39)(25,43,32,46)(26,45,47,44)(29,48,30,42)(35,41,36,40)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.